Bluelab pH Probe 5 Metre (16 ft)

Reach Distant Reservoirs With Reliable pH Readings, 5 m Cable

A worn pH probe drifts, responds slowly and stops holding calibration, and every reading after that is a guess. The Bluelab pH Probe is a double-junction replacement built for nutrient solution, with a standard BNC connector that fits Bluelab meters, monitors and controllers. A KCl-filled storage cap keeps it hydrated between uses.

The 5 m / 16 ft cable reaches deep tanks and reservoirs mounted away from the controller, common in commercial rooms.

Key Features & Benefits

• Double-junction design — built for dependable readings in nutrient solution.
• Standard BNC connector — fits all Bluelab devices with a BNC connection.
• 5 m / 16 ft cable — routes to the reservoir from a wall-mounted device.
• Probe holder and storage cap — suction-cup holder plus a KCl-filled storage cap.
• Waterproof polycarbonate body — rated for solutions from 0.2 EC and 0–60°C / 32–140°F.

Who Should Use the Bluelab pH Probe

Growers whose controller or monitor sits farther from the reservoir than a 2 m cable allows, including commercial setups with deep or remote tanks.

About Bluelab pH Probe 5 m

The Bluelab pH Probe measures pH 0.0–14.0 and works at device resolutions of 0.1 and 0.01 pH. It is suitable for solution, not soil, and carries a 6-month limited warranty.

Frequently Asked Questions

Which devices is the Bluelab pH Probe compatible with?

It fits all Bluelab handheld meters, monitors and controllers with a BNC connection, such as the Combo Meter, Guardian Monitor Wi-Fi and pH and Pro Controllers. The standard BNC connector makes swapping simple.

How long does a pH probe last?

pH probes are electrochemical sensors that wear out over time, much like a battery. Rinsing after use, keeping the KCl storage cap filled and regular cleaning and calibration all extend probe life.

Why does the probe have a KCl-filled storage cap?

The pH sensor must stay hydrated to respond quickly and read accurately. Storing it in KCl storage solution keeps the glass bulb and junction in good condition between uses.

What is a double-junction pH probe?

A double-junction probe has two reference chambers between the sensor and the solution. This slows contamination of the reference, helping the probe hold calibration in nutrient solutions.